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Dirt Bike Brands - Other
RM400 Stock jetting/Problems
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[QUOTE="DRH, post: 1190258, member: 75480"] My 1979 RM400 is just about finished and having a little problem with carburetion. I upgraded to a later mikuni with a larger 1/4 fuel inlet to get rid of the pee hole sized inlet that caused these bikes grief. First thing I noticed about the carb was I had to lower the fuel lever durastically to get it to quit slobbering out of the overflow. I would only leak while it was running i'm guessing because of the vibration? The float valve is brand new. I know the stock main jet is a #270 which is what I have, Slide needle #6jf6 on clip position #4, stock nozzle. However it seems to run extremely lean on the pilot circuit. The pilot jet I have in there is a #50 and i'm not sure if that's the right one. Could one of guys steer me in the right direction? [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
RM400 Stock jetting/Problems
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